AASTRA SIP-DECT (Release 3.0)- OM System Manual - Installation, Administration and Maintenance EN - Manual (Page 168)

SIP–DECT OM System Manual Release 3.0 9 Configuration und Administration Aspects
Aastra depl-1624/1.0 Page: 168 (241)
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Older 2G-RFPs (RFP (L) 32/34 / RFP (L) 42 WLAN use) “OpenMobility”.
Please note: The first lot of current RFPs comes with a pre-field trial software on board
which uses “OpenMobility” as DHCP client vendor class identifier. After update
to SIP–DECT 3.0RC3 or later the DHCP client vendor class identifier is
“OpenMobility3G”.
BOOTP/DHCP
Option Meaning Type Remarks
siaddr IP address of the
TFTP server 4 octets Optional for current
RFPs for SW update;
Mandatory for older
RFPs because of the
NETBOOT process;
File Path to the boot
image server by the
TFTP server N octets Optional for current
RFPs for SW update;
Mandatory for older
RFPs because of the
NETBOOT process
150 TFTP server list N * 4 octets Only used by the
NETBOOT process of
older RFPs
224 Magic String “OpenMobility” or
“OpenMobilitySIP-
DECT” The client uses this
option to select the
server, mandatory
* The magic string “OpenMobilitySIP-DECT” instead of “OpenMobility” (as defined in SIP–
DECT 2.x) makes sure that a SIP–DECT software is loaded into the RFP (L) 35/36/37 IP/
RFP (L) 43 WLAN even an different, non-SIP–DECT SW is previously installed and running.
Tip: Also refer to the DHCP configuration file example, see DHCP Configuration File.
9.5.4.3 Selecting the Right DHCP Server
The DHCP client requests its own IP address using code 50. The DHCP client will select the
DHCP server that offers the currently used IP address. Additionally the mandatory options
must be offered otherwise the DHCP offer is ignored by the DHCP client.
If no matching reply was received, the DHCP client resends the request 2 times after
1 second. Then the DHCP client will wait for 1 minute before resending 3 requests again.
If the DHCP client cannot accept an DHCP offer within 30 minutes, the RFP is rebooted.